What is a CAG?

Hello from Carriacou.

In the last post I shared that a tropical wave and a low were converging near the east coast of Central America.

In the open ocean, we would see this likely become an “invest”, but I asked if maybe it was too close to land to become anything notable.

Come to find out, when they did come together they created a Central American Gyre or CAG in the forecast. I hadn’t seen this before in a tropical discussion.

From the tropical weather discussion for the Atlantic:

“Heavy Rainfall over Central America and Mexico: A Central American Gyre (CAG) continues to develop. Widespread deep convection driven by the CAG is expected this weekend through next Friday, June 21. With persistent moist onshore flow, the heaviest rainfall totals with this event are expected along the Pacific coast of Chiapas State of Mexico, Guatemala, Honduras, El Salvador and northwestern Nicaragua. With this heavy rainfall, life- threatening flash floods and mudslides are likely in areas, especially in hilly terrains. Please refer to bulletins and forecasts from your local weather forecast and emergency management offices for specific information.
“